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rpm drop


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drives4x4
New User

Dec 20, 2012, 9:18 PM

Post #1 of 5 (981 views)
rpm drop Sign In

I have a 2001 blazer 4x4 that had begun to have rpm drop when put into drive. Drops to about 200 and stalls. This problem is intermittent . What should I check?

Thanks.


re-tired
Veteran / Moderator
re-tired profile image

Dec 20, 2012, 9:45 PM

Post #2 of 5 (958 views)
Re: rpm drop Sign In

start by cleaning the throttle plate and IAC.


LIFE'S SHORT GO FISH


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 21, 2012, 4:04 AM

Post #3 of 5 (920 views)
Re: rpm drop Sign In

Let me elaborate a little

You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



drives4x4
New User

Dec 22, 2012, 11:40 PM

Post #4 of 5 (887 views)
Re: rpm drop Sign In

Many thanks! I will do this and let you know

In Reply To
_Smile


drives4x4
New User

Dec 22, 2012, 11:43 PM

Post #5 of 5 (886 views)
Re: rpm drop Sign In

GOING TO TRY THIS! Thanks.






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